Another editor that people might be interested in (and I think more people should know about) is https://github.com/martanne/vis. It is, in some ways, the opposite of Ki; instead of straying further from vim, Vis is just Vim + good multiple cursor support + sam-styled structural regexes (I didn't know what those are before using Vis, I consider it a detail of how the multiple cursor interface works).

Thus, Vis is easier to learn than Helix/Kakoune and gives you (IMO) the most useful feature of Helix/Kakoune.

Unfortunately, Vis is also a bit bare-bones, I don't think it has LSP support for instance.